Notwithstanding the merits of this case, I'm against the concept of unlimited time deed restrictions on property. Dead people should not be able to decide what living people can do with land or any other property indefinitely. That's why we have things like the rule against perpetuities, and requirements that charitable foundations spend a certain percentage of their assets every year.

Some of these ideas strongly carry over to the idea of AIs acting as autonomous agents as well.

Yes, they should if they are selling the land for $10. You don't want limits? Pay without limits.